text: #ifndef _ASM_X86_SETUP_H
  #define _ASM_X86_SETUP_H
  
  #include <uapi/asm/setup.h>
  
  
  #define COMMAND_LINE_SIZE 2048
  
  #ifdef __i386__
  
  #include <linux/pfn.h>
  /*
   * Reserved space for vmalloc and iomap - defined in asm/page.h
   */
  #define MAXMEM_PFN	PFN_DOWN(MAXMEM)
  #define MAX_NONPAE_PFN	(1 << 20)
  
  #endif /* __i386__ */
  
  #define PARAM_SIZE 4096		/* sizeof(struct boot_params) */
  
  #define OLD_CL_MAGIC		0xA33F
  #define OLD_CL_ADDRESS		0x020	/* Relative to real mode data */
  #define NEW_CL_POINTER		0x228	/* Relative to real mode data */
  
  #ifndef __ASSEMBLY__
  #include <asm/bootparam.h>
  #include <asm/x86_init.h>
  
  /* Interrupt control for vSMPowered x86_64 systems */
  #ifdef CONFIG_X86_64
  void vsmp_init(void);
  #else
  static inline void vsmp_init(void) { }
  #endif
  
  void setup_bios_corruption_check(void);
  
  #ifdef CONFIG_X86_VISWS
  extern void visws_early_detect(void);
  #else
  static inline void visws_early_detect(void) { }
  #endif
  
  extern unsigned long saved_video_mode;
  
  extern void reserve_standard_io_resources(void);
  extern void i386_reserve_resources(void);
  extern void setup_default_timer_irq(void);
  
  #ifdef CONFIG_X86_INTEL_MID
  extern void x86_mrst_early_setup(void);
  #else
  static inline void x86_mrst_early_setup(void) { }
  #endif
  
  #ifdef CONFIG_X86_INTEL_CE
  extern void x86_ce4100_early_setup(void);
  #else
  static inline void x86_ce4100_early_setup(void) { }
  #endif
  
  #ifndef _SETUP
  
  /*
   * This is set up by the setup-routine at boot-time
   */
  extern struct boot_params boot_params;
  
  /*
   * Do NOT EVER look at the BIOS memory size location.
   * It does not work on many machines.
   */
  #define LOWMEMSIZE()	(0x9f000)
  
  /* exceedingly early brk-like allocator */
  extern unsigned long _brk_end;
  void *extend_brk(size_t size, size_t align);
  
  /*
   * Reserve space in the brk section.  The name must be unique within
   * the file, and somewhat descriptive.  The size is in bytes.  Must be
   * used at file scope.
   *
   * (This uses a temp function to wrap the asm so we can pass it the
   * size parameter; otherwise we wouldn't be able to.  We can't use a
   * "section" attribute on a normal variable because it always ends up
   * being @progbits, which ends up allocating space in the vmlinux
   * executable.)
   */
  #define RESERVE_BRK(name,sz)						\
  	static void __section(.discard.text) __used notrace		\
  	__brk_reservation_fn_##name##__(void) {				\
  		asm volatile (						\
  			".pushsection .brk_reservation,\"aw\",@nobits;" \
  			".brk." #name ":"				\
  			" 1:.skip %c0;"					\
  			" .size .brk." #name ", . - 1b;"		\
  			" .popsection"					\
  			: : "i" (sz));					\
  	}
  
  /* Helper for reserving space for arrays of things */
  #define RESERVE_BRK_ARRAY(type, name, entries)		\
  	type *name;					\
  	RESERVE_BRK(name, sizeof(type) * entries)
  
  extern void probe_roms(void);
  #ifdef __i386__
  
  void __init i386_start_kernel(void);
  
  #else
  void __init x86_64_start_kernel(char *real_mode);
  void __init x86_64_start_reservations(char *real_mode_data);
  
  #endif /* __i386__ */
  #endif /* _SETUP */
  #else
  #define RESERVE_BRK(name,sz)				\
  	.pushsection .brk_reservation,"aw",@nobits;	\
  .brk.name:						\
  1:	.skip sz;					\
  	.size .brk.name,.-1b;				\
  	.popsection
  #endif /* __ASSEMBLY__ */
  #endif /* _ASM_X86_SETUP_H */
  